Peters was optioned to Triple-A New Orleans on Monday, Clark Spencer of the Miami Herald reports.
Peters was sent back to the minors in order to open up a spot on the roster for Odrisamer Despaigne, who was reinstated from the disabled list in a corresponding move. The 25-year-old southpaw didn't make an appearance during his brief stint with the Marlins. He'll rejoin the Baby Cakes' rotation, where he'll serve as organizational pitching depth.